CN115727578A - Air supply enthalpy increasing control method and device, air conditioner and storage medium - Google Patents
Air supply enthalpy increasing control method and device, air conditioner and storage medium Download PDFInfo
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Abstract
The invention provides a method and a device for controlling air supplement and enthalpy increase, an air conditioner and a storage medium, and relates to the technical field of air conditioners. That is, the invention reasonably takes value of the initial opening degree of the auxiliary electronic expansion valve according to the current ambient temperature of the air conditioner and the current starting load of the air conditioner, thereby enabling the system to be stable quickly.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a method and a device for controlling air supply and enthalpy increase, an air conditioner and a storage medium.
Background
At present, a system adopting an air-supplying and enthalpy-increasing technology is used, the air-supplying and enthalpy-increasing technology is mainly used in low-temperature heating, and an auxiliary path refrigerant is used for supercooling a main path refrigerant.
In the prior art, after a heating mode meets an air-supply enthalpy-increasing opening condition, an auxiliary electromagnetic valve and an auxiliary electronic expansion valve are opened, the initial opening degree of the auxiliary electronic expansion valve is a fixed value, and after the auxiliary electronic expansion valve is operated for a period of time (for example, 1 to 3 minutes) according to the initial opening degree, regulation and control are performed according to the inlet and outlet superheat degrees of a plate heat exchanger. However, if the initial opening degree is too large or too small, the time for the system to reach the stable state is prolonged, and the opening degree of the auxiliary electronic expansion valve is frequently adjusted, so that the system is fluctuated, and the system is more difficult to stably operate.
Disclosure of Invention
The invention solves the problem of how to reasonably take the value of the initial opening of the auxiliary electronic expansion valve so as to quickly stabilize the system.
In order to solve the above problems, the present invention provides a vapor-filling enthalpy-increasing control method, including: when the air conditioner is started to supplement air and increase enthalpy, acquiring the current ambient temperature of the air conditioner and the current starting load of the air conditioner; determining the initial opening degree of an auxiliary electronic expansion valve of the air conditioner according to the current environment temperature and the current starting load; wherein the current ambient temperature and the current boot load are both positively correlated with the initial opening degree; and controlling the auxiliary electronic expansion valve to operate at the initial opening degree.
Compared with the prior art, the vapor-supplementing and enthalpy-increasing control method has the following advantages: when the air conditioner is started to supplement air and increase enthalpy, the initial opening degree of the auxiliary electronic expansion valve is determined according to the current environment temperature of the air conditioner and the current starting load of the air conditioner, the current environment temperature and the current starting load are in positive correlation with the initial opening degree, and the auxiliary electronic expansion valve is controlled to operate at the initial opening degree. That is, the invention reasonably takes value of the initial opening degree of the auxiliary electronic expansion valve according to the current ambient temperature of the air conditioner and the current starting load of the air conditioner, thereby enabling the system to be stable quickly.
Optionally, the step of determining an initial opening degree of an auxiliary electronic expansion valve of the air conditioner according to the current ambient temperature and the current startup load includes:
according to the current environment temperature, determining a target environment temperature coefficient corresponding to the current environment temperature from a pre-stored environment temperature coefficient table; the environment temperature coefficient table represents the corresponding relation between the environment temperature and the environment temperature coefficient, and the lower the environment temperature is, the smaller the environment temperature coefficient is;
determining a target load coefficient corresponding to the current starting load from a pre-stored load coefficient table according to the current starting load; the load coefficient table represents the corresponding relation between the boot load and the load coefficient, and the smaller the boot load is, the smaller the load coefficient is;
and calculating the initial opening according to the target environment temperature coefficient and the target load coefficient.
Optionally, the loop temperature coefficient table includes a plurality of loop temperature intervals and a loop temperature coefficient corresponding to each loop temperature interval, and the lower the loop temperature interval is, the smaller the corresponding loop temperature coefficient is;
the step of determining a target environment temperature coefficient corresponding to the current environment temperature from a pre-stored environment temperature coefficient table according to the current environment temperature comprises the following steps:
determining a target environment temperature interval to which the current environment temperature belongs from the plurality of environment temperature intervals;
and taking the ring temperature coefficient corresponding to the target ring temperature interval as the target ring temperature coefficient.
Optionally, the load coefficient table includes a plurality of boot load intervals and a load coefficient corresponding to each boot load interval, and the smaller the boot load interval is, the smaller the corresponding load coefficient is;
the step of determining a target load coefficient corresponding to the current boot load from a pre-stored load coefficient table according to the current boot load comprises:
determining a target starting load interval to which the current starting load belongs from the plurality of starting load intervals;
and taking the load coefficient corresponding to the target startup load interval as the target load coefficient.
Optionally, the step of calculating the initial opening degree according to the target ambient temperature coefficient and the target load coefficient includes:
calculating the initial opening according to a preset formula Psi = X Y a according to the target ring temperature coefficient and the target load coefficient;
wherein Psi represents the initial opening degree, X represents the target ring temperature coefficient, and Y represents the target load coefficient; a represents a setting parameter.
Optionally, the vapor-filling enthalpy-increasing control method further includes:
after the auxiliary electronic expansion valve operates for a set time length at the initial opening degree, acquiring the actual time length and the preset reference time length required by the air conditioner to reach a stable operation state;
judging whether the initial opening degree is reasonable or not according to the actual time length and the preset reference time length;
and if the initial opening degree is not reasonable, correcting the initial opening degree according to the current regulation trend of the auxiliary electronic expansion valve to obtain the corrected initial opening degree, and controlling the auxiliary electronic expansion valve to operate at the corrected initial opening degree when the air conditioner is started for the next time for air supplement and enthalpy increase.
Optionally, the step of judging whether the initial opening degree is reasonable according to the actual time length and a preset reference time length includes:
judging whether the actual time length is greater than the product of the preset reference time length and a set correction coefficient;
if so, judging that the initial opening degree is not reasonable;
if not, judging that the initial opening degree is reasonable.
Optionally, the step of correcting the initial opening degree according to the current adjustment trend of the auxiliary electronic expansion valve to obtain a corrected initial opening degree includes:
if the current regulation trend is continuously reduced, reducing the initial opening according to a preset formula Psi _ n = delta 1 Psi to obtain the corrected initial opening;
if the current adjusting trend is continuous opening, increasing the initial opening according to a preset formula Psi _ n = delta 2 Psi to obtain the corrected initial opening;
wherein Psi _ n represents the corrected initial opening; δ 1 represents a valve-closing coefficient, and 0 < δ 1 < 1; δ 2 represents a valve opening coefficient, and δ 2 > 1.
Optionally, the vapor-filling enthalpy-increasing control method further includes:
and if the initial opening degree is reasonable, controlling the auxiliary electronic expansion valve to operate at the initial opening degree when the air conditioner starts air supply and enthalpy increase next time.
The invention also provides a vapor-supplying enthalpy-increasing control device, which comprises: the system comprises an acquisition module, a judgment module and a control module, wherein the acquisition module is used for acquiring the current ambient temperature of an air conditioner and the current starting load of the air conditioner when the air conditioner is started to supplement air and increase enthalpy; the determining module is used for determining the initial opening degree of a bypass electronic expansion valve of the air conditioner according to the current environment temperature and the current starting load; wherein the current ambient temperature and the current boot load are both positively correlated with the initial opening degree; and the control module is used for controlling the auxiliary electronic expansion valve to operate at the initial opening degree.
The invention also provides an air conditioner, which comprises a processor and a memory, wherein the memory is used for storing programs, and the processor is used for realizing the air-supply enthalpy-increasing control method when executing the programs.
The invention also provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the above-mentioned method of vapor injection control.
Drawings
Fig. 1 is an exemplary diagram of a heating process of an air conditioner according to the present invention.
FIG. 2 is a schematic flow chart of a vapor-filling enthalpy-increasing control method according to the present invention.
Fig. 3 is another schematic flow chart of the vapor-filling enthalpy-increasing control method provided by the invention.
Fig. 4 is a schematic block diagram of an enthalpy-increasing vapor injection control device according to the present invention.
Fig. 5 is a block diagram of an air conditioner according to the present invention.
Description of reference numerals:
10-an air conditioner; 11-a processor; 12-a memory; 13-a bus; 100-air-supply enthalpy-increasing control device; 101-an acquisition module; 102-a determination module; 103-control module.
Detailed Description
At present, a system adopting an air-supplying and enthalpy-increasing technology is used, the air-supplying and enthalpy-increasing technology is mainly used in low-temperature heating, and an auxiliary path refrigerant is used for supercooling a main path refrigerant. Referring to fig. 1, the auxiliary refrigerant refers to a refrigerant entering an air supplement port of the compressor after passing through the auxiliary electronic expansion valve and the plate heat exchanger, and the main refrigerant refers to a refrigerant entering the outdoor unit heat exchanger after passing through the main electronic expansion valve and the plate heat exchanger.
After the refrigerant of the main path is supercooled, compared with the refrigerant which is not supercooled, the enthalpy value of the refrigerant at the inlet of the heat exchanger is low, the temperature is low, and the pressure is the same, and the main path is generally controlled by the suction superheat degree in the prior stage, namely, the temperature and the enthalpy value of the refrigerant at the outlet under the same pressure are controlled to be the same. Therefore, when the heat exchanger capacity is sufficient, the enthalpy value of the refrigerant at the inlet is lower than that of the refrigerant not yet supercooled, and the enthalpy value of the refrigerant at the outlet is uniform. That is, the mass flow of the main path refrigerant is not changed, the enthalpy difference of the inlet and outlet refrigerants is increased, and the main path heat exchange amount is increased because the main path evaporator heat exchange amount = the enthalpy difference of the inlet and outlet refrigerants of the evaporator.
The auxiliary path refrigerant directly enters the compressor medium pressure cavity through the compressor air supplementing port after passing through the auxiliary path electronic expansion valve and the plate heat exchanger for heat exchange, so that the refrigerant flow mass of the condensation side of the system is increased, and the heat exchange quantity of the system is improved as the heating quantity = the refrigerant mass flow and the enthalpy difference of the refrigerant inlet and the refrigerant outlet of the condenser.
That is, the air-supplying enthalpy-increasing technology can increase the heat exchange quantity of the main path and improve the heating quantity of the system, so that the air-supplying enthalpy-increasing technology is widely applied to scenes needing low-temperature heating.
In the prior art, after a heating mode meets an air-supply enthalpy-increasing opening condition, an auxiliary road solenoid valve and an auxiliary road electronic expansion valve are opened, an initial opening degree of the auxiliary road electronic expansion valve is a fixed value, the auxiliary road electronic expansion valve is controlled to operate for a period of time (for example, 1 to 3 minutes) at the initial opening degree, and then the opening degree of the auxiliary road electronic expansion valve is regulated and controlled according to an inlet and outlet superheat degree of a plate heat exchanger, wherein the inlet and outlet superheat degree = an auxiliary road outlet temperature TH 6-an auxiliary road inlet temperature TH5. The time for the system to reach the stability is prolonged due to the fact that the initial opening degree is too large or too small, the opening degree of the auxiliary electronic expansion valve is frequently adjusted, system fluctuation is caused, and the system is difficult to operate stably.
In order to solve the technical problem, the initial opening degree of the auxiliary electronic expansion valve is reasonably valued according to the current ambient temperature of the air conditioner and the current starting load of the air conditioner, so that the system can be quickly stabilized. As described in detail below.
The air conditioner in the present embodiment may be a multi-split air conditioner, a variable frequency air conditioner, a fixed frequency air conditioner, a heat pump type air conditioner, or the like, and the multi-split air conditioner will be described below as an example.
Referring to fig. 2, fig. 2 shows a schematic flow chart of the vapor-filling enthalpy-increasing control method provided by the present invention. The air-supplementing enthalpy-increasing control method is applied to an air conditioner and can comprise the following steps:
s101, when the air conditioner is started to supplement air and increase enthalpy, the current ambient temperature of the air conditioner and the current starting load of the air conditioner are obtained.
In this embodiment, the opening of the air conditioner to increase the air supply enthalpy means opening the auxiliary solenoid valve and the auxiliary electronic expansion valve when the air supply enthalpy control condition is satisfied in the heating mode. In order to make the system reach stability rapidly, the initial opening degree of the auxiliary electronic expansion valve needs to be taken reasonably.
S102, determining the initial opening degree of a bypass electronic expansion valve of the air conditioner according to the current environment temperature and the current starting load; and the current environment temperature and the current starting load are positively correlated with the initial opening.
In this embodiment, during heating operation, as the ambient temperature decreases, the inlet temperature and pressure of the refrigerant in the heat exchanger also decrease with the same heat exchange temperature difference.
Meanwhile, according to research data, the flow control of the auxiliary circuit can be controlled by reference pressure value, and the pressure calculation formula of the auxiliary circuit air-supplementing refrigerant is as follows:
wherein, pm represents the pressure in compressor middling pressure chamber, and pe represents system evaporating pressure, and pc represents system condensing pressure, and the unit of pm, pe and pc is MPa.
Therefore, the lower the ambient temperature, the lower the system evaporation pressure, and the lower the flow rate of the secondary circuit, whereas the higher the ambient temperature, the higher the system evaporation pressure, and the higher the flow rate of the secondary circuit. Accordingly, the lower the ambient temperature, the smaller the initial opening degree of the auxiliary electronic expansion valve should be, and the higher the ambient temperature, the larger the initial opening degree of the auxiliary electronic expansion valve should be, i.e., the ambient temperature is positively correlated with the initial opening degree of the auxiliary electronic expansion valve.
In this embodiment, since the boot load = the boot internal unit capacity/the external unit rated capacity, the boot load determines the target operating frequency of the unit. The larger the starting load is, the higher the target operation frequency is, and under the same condition, the higher the target operation frequency is, the larger the system refrigerant circulation quantity is, and the optimal air supplement quantity of the auxiliary road is increased. On the contrary, the smaller the starting load, the lower the target operation frequency, and under the same condition, the lower the target operation frequency, the smaller the system refrigerant circulation amount, and the optimal air supplement amount of the auxiliary road is also reduced.
Accordingly, the larger the starting load, the larger the initial opening degree of the auxiliary electronic expansion valve should be, and the smaller the starting load, the smaller the initial opening degree of the auxiliary electronic expansion valve should be, that is, the starting loads are all positively correlated with the initial opening degree of the auxiliary electronic expansion valve.
And S103, controlling the auxiliary electronic expansion valve to operate at the initial opening degree.
In this embodiment, after the initial opening degree of the auxiliary electronic expansion valve is determined according to the current ambient temperature of the air conditioner and the current start-up load of the air conditioner and according to the logic that the current ambient temperature and the current start-up load are both in positive correlation with the initial opening degree, the auxiliary electronic expansion valve is controlled to be opened to the initial opening degree and then operated, so that air supply and enthalpy increase are performed.
The above analysis of the influence of the ambient temperature and the boot load on the initial opening degree of the auxiliary electronic expansion valve, and the following description of the detailed process of determining the initial opening degree of the auxiliary electronic expansion valve according to the current ambient temperature and the current boot load, step S102 may include sub-steps S1021 to S1023.
And S1021, determining a target environment temperature coefficient corresponding to the current environment temperature from a pre-stored environment temperature coefficient table according to the current environment temperature.
In this embodiment, the loop temperature coefficient table represents the corresponding relationship between the ambient temperature and the loop temperature coefficient, and the lower the ambient temperature is, the smaller the loop temperature coefficient is. Therefore, an ambient temperature coefficient may be set for one ambient temperature, and an ambient temperature coefficient may also be set for one ambient temperature interval, which will be described below as an example.
Optionally, the loop temperature coefficient table may include a plurality of loop temperature intervals and a loop temperature coefficient corresponding to each loop temperature interval, and the lower the loop temperature interval is, the smaller the corresponding loop temperature coefficient is. The multiple ring temperature intervals can be divided according to the auxiliary road opening ring temperature, the rated heating working condition, the low-temperature heating working condition and the ultralow-temperature heating working condition.
For example, assuming that the bypass opening loop temperature is 15 ℃, the rated heating condition is 7 ℃, the low-temperature heating condition is 2 ℃, and the ultra-low-temperature heating condition is-7 ℃ and-15 ℃, the loop temperature coefficient table is established as shown in the following table:
wherein, the ring temperature coefficient is represented by X, the environment temperature is represented by Ta, and the lower the environment temperature Ta is, the value of X is smaller, namely, 1 is more than X1 and more than X2 and more than X3 and more than X4 and more than X5. Meanwhile, X1, X2, X3, X4, and X5 may be taken empirically, for example, as follows: 0.7 plus or minus 0.1, 0.6 plus or minus 0.1, 0.5 plus or minus 0.1, 0.4 plus or minus 0.1 and 0.3 plus or minus 0.1.
It should be noted that the values of the auxiliary circuit opening loop temperature, the rated heating condition, the low-temperature heating condition and the ultra-low-temperature heating condition are only examples, and may be flexibly set according to specific situations in practical applications, and the present invention does not limit this.
Therefore, the process of determining the target loop temperature coefficient corresponding to the current environment temperature from the pre-stored loop temperature coefficient table according to the current environment temperature may include:
determining a target environment temperature interval to which the current environment temperature belongs from a plurality of environment temperature intervals;
and taking the corresponding ring temperature coefficient of the target ring temperature interval as a target ring temperature coefficient.
For example, assuming that the current environment temperature is 10 ℃, the target ring temperature range to which the environment temperature belongs is determined to be 15 ℃ or more and Ta & gt 7 ℃, and then the target ring temperature coefficient can be determined to be X1.
And S1022, determining a target load coefficient corresponding to the current boot load from a pre-stored load coefficient table according to the current boot load.
In this embodiment, the load coefficient table represents the correspondence between the boot load and the load coefficient, and the smaller the boot load, the smaller the load coefficient. Therefore, a load factor may be set for a boot load, or a load factor may be set for a boot load interval, which is described below as an example.
Optionally, the load coefficient table includes a plurality of boot load intervals and a load coefficient corresponding to each boot load interval, and the smaller the boot load interval is, the smaller the corresponding load coefficient is. The multiple start-up load intervals can be flexibly divided according to the actual start-up load condition of the air conditioner, for example, divided according to 20%, 40%, 60% and 80%, and a load coefficient table is established as shown in the following table:
the load coefficient is represented by Y, the boot load is represented by Qf, and the smaller the boot load Qf is, the smaller the value of Y is, namely 1 > Y2 > Y3 > Y4 > Y5. Meanwhile, Y1, Y2, Y3, Y4, and Y5 may be taken empirically, for example, as follows: 0.7 plus or minus 0.1, 0.6 plus or minus 0.1, 0.5 plus or minus 0.1, 0.4 plus or minus 0.1 and 0.3 plus or minus 0.1.
It should be noted that the division of the boot load interval is only an example, and may be flexibly set according to specific situations in practical applications, which is not limited in this respect.
Optionally, the process of determining the target load coefficient corresponding to the current boot load from the pre-stored load coefficient table according to the current boot load may include:
determining a target starting load interval to which the current starting load belongs from a plurality of starting load intervals;
and taking the load coefficient corresponding to the target startup load interval as a target load coefficient.
For example, assuming that the current boot load is 30%, the target boot load interval to which the current boot load belongs is determined to be 40% ≧ Qf > 20%, and then the target load coefficient may be determined to be Y4.
And S1023, calculating the initial opening according to the target environment temperature coefficient and the target load coefficient.
In this embodiment, the initial opening degree of the auxiliary electronic expansion valve may be calculated according to a preset formula Psi = X × Y × a according to the target loop temperature coefficient and the target load coefficient;
wherein Psi represents an initial opening degree, X represents a target ring temperature coefficient, and Y represents a target load coefficient; a represents a setting parameter, and the value range of a can be [60, 480].
It should be noted that the value range of a is only an example, and may be flexibly set according to specific situations in practical applications, and the present invention does not limit this.
In this embodiment, the initial opening of the auxiliary electronic expansion valve is reasonably selected according to the current ambient temperature of the air conditioner and the current start-up load of the air conditioner, so that the system can be quickly stabilized. On the basis, the initial opening degree can be adjusted in a self-adaptive mode in the subsequent air supplying and enthalpy increasing process of the air conditioner, so that the system stability is accelerated.
Therefore, referring to fig. 3 on the basis of fig. 2, after step S103, the method for controlling enthalpy addition by vapor injection provided by the present invention may further include steps S104 to S107.
And S104, after the auxiliary electronic expansion valve runs for a set time length at the initial opening degree, acquiring the actual time length and the preset reference time length required by the air conditioner to reach the stable running state.
In this embodiment, after the unit is operated at the initial opening for a set time (for example, 1 to 2 minutes), the auxiliary electronic expansion valve is freely adjusted by the superheat degree of the inlet and the outlet of the plate heat exchanger (outlet temperature-inlet temperature), and the main electronic expansion valve is freely adjusted by the suction superheat degree (suction temperature-saturation temperature corresponding to low pressure).
Therefore, the time length t1 for closing or opening the valve of the auxiliary electronic expansion valve after the unit finishes operating at the initial opening degree is recorded, if the valve is continuously closed or continuously opened, the initial opening degree is not appropriate, and the system adjusts the valve step according to the superheat degree, namely, the difference between the initial opening degree of the auxiliary electronic expansion valve and the valve step after the system stably operates is large, large or small.
However, considering that the multi-split system is complicated and the system adjustment is not in one step, time control may be adopted. Namely, a preset reference time ts is set, and after the representation unit operates at the initial opening degree, the superheat degree is adopted to control the auxiliary electronic expansion valve until the system reaches the stable reference time. Meanwhile, after the unit is operated at the initial opening degree, the superheat degree is adopted to control the auxiliary electronic expansion valve until the system reaches a stable actual time t1. And then, correcting the initial opening degree of the auxiliary electronic expansion valve according to the relation between the actual time t1 and the preset reference time ts.
And S105, judging whether the initial opening degree is reasonable or not according to the actual time length and the preset reference time length.
In this embodiment, it may be determined whether the actual time duration t1 is greater than a product of the preset reference time duration ts and the set correction coefficient η 1, that is, whether t1 > η 1 × ts is true, and if true, it is determined that the initial opening degree is not reasonable; if not, judging that the initial opening degree is reasonable.
Alternatively, the set correction coefficient η 1 may be empirically set, for example, 1.1 to 1.2.
It should be noted that the value range of the set correction coefficient η 1 is only an example, and may be flexibly set according to specific situations in practical applications, and the present invention does not limit this.
And S106, if the initial opening degree is not reasonable, correcting the initial opening degree according to the current regulation trend of the auxiliary electronic expansion valve to obtain the corrected initial opening degree, and controlling the auxiliary electronic expansion valve to operate at the corrected initial opening degree when the air conditioner starts air supply and enthalpy increase next time.
In this embodiment, if the initial opening degree of the auxiliary electronic expansion valve is not reasonable, it indicates that the initial opening degree deviates from the valve step after the system is stabilized, and at this time, the initial opening degree needs to be corrected, and the corrected initial opening degree is used as the initial opening degree of the auxiliary electronic expansion valve when the air conditioner is opened for increasing enthalpy by air compensation next time, so as to accelerate the system stabilization.
Alternatively, the initial opening degree may be corrected according to the current regulation trend of the auxiliary electronic expansion valve, that is:
if the secondary regulation trend is continuously reduced, reducing the initial opening according to a preset formula Psi _ n = delta 1 Psi to obtain a corrected initial opening;
and if the secondary regulation trend is continuous opening, the initial opening is regulated to be larger according to a preset formula Psi _ n = delta 2 Psi, and the corrected initial opening is obtained.
Wherein Psi _ n represents the corrected initial opening; δ 1 represents a valve closing coefficient, and 0 < δ 1 < 1, e.g., δ 1 ∈ [0.8,0.9]; δ 2 represents the valve opening coefficient, and δ 2 > 1, e.g., δ 2 ∈ [1.1,1.2].
It should be noted that, the value ranges of the valve closing coefficient δ 1 and the valve opening coefficient δ 2 are only examples, and may be flexibly set according to specific situations in practical applications, and the present invention does not limit this.
And S107, if the initial opening degree is reasonable, controlling the auxiliary electronic expansion valve to operate at the initial opening degree when the air conditioner opens air-supplementing enthalpy increasing next time.
In this embodiment, if the initial opening of the auxiliary electronic expansion valve is reasonable, it is indicated that the initial opening is close to the valve step after the system is stabilized, and at this time, the initial opening does not need to be corrected, and the initial opening is directly used as the initial opening of the auxiliary electronic expansion valve when the air conditioner is opened for the next time to supplement air and increase enthalpy, so that the system is stabilized quickly.
Compared with the prior art, the vapor-supplementing enthalpy-increasing control provided by the invention has the following advantages:
firstly, reasonably taking a value of the initial opening degree of the auxiliary electronic expansion valve according to the current ambient temperature of the air conditioner and the current starting load of the air conditioner, so that the system can be quickly stabilized;
secondly, dividing different environment temperature coefficients and load coefficients according to the environment temperature and the starting load, and dividing and optimizing the initial opening of the auxiliary electronic expansion valve to ensure the quick adjustment and the quick stability of the system;
and thirdly, after the unit runs at the initial opening, the initial opening of the auxiliary electronic expansion valve is adaptively adjusted through the actual time length required by the air conditioner to reach the stable running state and the preset reference time length, so that the initial opening of the auxiliary electronic expansion valve when the air conditioner is opened for air supplement and enthalpy increase next time is obtained, and the system stability is accelerated.
In order to perform the corresponding steps in the above embodiments and various possible implementations, an implementation of the vapor-filling enthalpy-increasing control device is given below.
Fig. 4 is a schematic functional block diagram of an enthalpy-increasing vapor injection control apparatus 100 according to the present invention. It should be noted that the basic principle and the technical effects of the vapor-filling enthalpy-increasing control device 100 described in this embodiment are the same as those of the foregoing method embodiment, and for brief description, reference may be made to corresponding contents of the foregoing method embodiment for portions that are not mentioned in this embodiment. The vapor-supplying enthalpy-increasing control device 100 is applied to an air conditioner, and the vapor-supplying enthalpy-increasing control device 100 is described below with reference to fig. 4, where the vapor-supplying enthalpy-increasing control device 100 includes: the device comprises an acquisition module 101, a determination module 102 and a control module 103.
The obtaining module 101 is configured to obtain a current ambient temperature of the air conditioner and a current start-up load of the air conditioner when the air conditioner starts to supplement air and increase enthalpy.
The determining module 102 is configured to determine an initial opening degree of a bypass electronic expansion valve of the air conditioner according to a current ambient temperature and a current startup load; and the current environment temperature and the current starting load are positively correlated with the initial opening.
And the control module 103 is used for controlling the auxiliary electronic expansion valve to operate at the initial opening degree.
Optionally, the determining module 102 is specifically configured to:
according to the current environment temperature, determining a target environment temperature coefficient corresponding to the current environment temperature from a pre-stored environment temperature coefficient table; the environment temperature coefficient table represents the corresponding relation between the environment temperature and the environment temperature coefficient, and the lower the environment temperature is, the smaller the environment temperature coefficient is;
according to the current starting load, determining a target load coefficient corresponding to the current starting load from a pre-stored load coefficient table; the load coefficient table represents the corresponding relation between the starting load and the load coefficient, and the smaller the starting load is, the smaller the load coefficient is;
and calculating the initial opening according to the target ring temperature coefficient and the target load coefficient.
Optionally, the loop temperature coefficient table includes a plurality of loop temperature intervals and a loop temperature coefficient corresponding to each loop temperature interval, and the lower the loop temperature interval is, the smaller the corresponding loop temperature coefficient is;
the determining module 102 executes a method of determining a target ring temperature coefficient corresponding to the current environment temperature from a pre-stored ring temperature coefficient table according to the current environment temperature, including:
determining a target environment temperature interval to which the current environment temperature belongs from a plurality of environment temperature intervals;
and taking the corresponding ring temperature coefficient of the target ring temperature interval as a target ring temperature coefficient.
Optionally, the load coefficient table includes a plurality of boot load intervals and a load coefficient corresponding to each boot load interval, and the smaller the boot load interval is, the smaller the corresponding load coefficient is;
the determining module 102 executes a method of determining a target load coefficient corresponding to the current boot load from a pre-stored load coefficient table according to the current boot load, including:
determining a target starting load interval to which the current starting load belongs from a plurality of starting load intervals;
and taking the load coefficient corresponding to the target startup load interval as a target load coefficient.
Optionally, the determining module 102 executes a manner of calculating the initial opening degree according to the target ambient temperature coefficient and the target load coefficient, including:
calculating an initial opening according to a preset formula Psi = X Y a according to the target annular temperature coefficient and the target load coefficient;
wherein Psi represents an initial opening degree, X represents a target ring temperature coefficient, and Y represents a target load coefficient; a represents a setting parameter.
Optionally, the control module 103 is further configured to:
after the auxiliary electronic expansion valve runs for a set time length at an initial opening degree, acquiring the actual time length and the preset reference time length required by the air conditioner to reach a stable running state;
judging whether the initial opening degree is reasonable or not according to the actual time length and a preset reference time length;
and if the initial opening degree is not reasonable, correcting the initial opening degree according to the current regulation trend of the auxiliary electronic expansion valve to obtain the corrected initial opening degree, and controlling the auxiliary electronic expansion valve to operate at the corrected initial opening degree when the air conditioner is opened for supplementing air and increasing enthalpy next time.
Optionally, the step of the control module 103 executing a mode of judging whether the initial opening degree is reasonable according to the actual time length and the preset reference time length includes:
judging whether the actual time length is larger than the product of the preset reference time length and the set correction coefficient;
if so, judging that the initial opening degree is unreasonable;
if not, judging that the initial opening degree is reasonable.
Optionally, the control module 103 executes a manner of correcting the initial opening degree according to the current adjustment trend of the auxiliary electronic expansion valve to obtain a corrected initial opening degree, including:
if the secondary regulation trend is continuously reduced, reducing the initial opening according to a preset formula Psi _ n = delta 1 Psi to obtain a corrected initial opening;
if the current adjusting trend is continuously opened, the initial opening degree is adjusted to be larger according to a preset formula Psi _ n = delta 2 Psi to obtain a corrected initial opening degree;
wherein Psi _ n represents the corrected initial opening degree; δ 1 represents a valve-closing coefficient, and 0 < δ 1 < 1; δ 2 represents a valve opening coefficient, and δ 2 > 1.
Optionally, the control module 103 is further configured to: if the initial opening degree is reasonable, the auxiliary electronic expansion valve is controlled to operate at the initial opening degree when the air conditioner opens the air supply and enthalpy increase for the next time.
Referring to fig. 5, fig. 5 is a block diagram of an air conditioner 10 according to the present invention, in which the air conditioner 10 includes a processor 11, a memory 12 and a bus 13, and the processor 11 and the memory 12 are connected by the bus 13.
The memory 12 is used for storing a program, such as the vapor-filling enthalpy-increasing control device 100 shown in fig. 5. The vapor-filling enthalpy-increasing control device 100 includes at least one software functional module that can be stored in the memory 12 in the form of software or firmware (firmware). After receiving the execution instruction, the processor 11 executes the program to implement the vapor-filling enthalpy-increasing control method disclosed in the following embodiments.
The processor 11 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the air conditioner testing method may be implemented by an integrated logic circuit of hardware in the processor 11 or instructions in the form of software. The Processor 11 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components.
The present invention further provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by the processor 11, implements the vapor filling enthalpy control method disclosed in the above embodiments.
In summary, according to the air-supplement enthalpy-increase control method, the air-supplement enthalpy-increase control device, the air conditioner and the storage medium provided by the invention, when the air conditioner starts air-supplement enthalpy-increase, the initial opening degree of the auxiliary electronic expansion valve is determined according to the current environment temperature of the air conditioner and the current start-up load of the air conditioner, the current environment temperature and the current start-up load are both positively correlated to the initial opening degree, and the auxiliary electronic expansion valve is controlled to operate at the initial opening degree. That is, the invention reasonably takes value of the initial opening degree of the auxiliary electronic expansion valve according to the current ambient temperature of the air conditioner and the current starting load of the air conditioner, thereby enabling the system to be stable quickly.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (12)
1. A vapor-supplying enthalpy-increasing control method is characterized by comprising the following steps:
when the air conditioner is started to supplement air and increase enthalpy, acquiring the current ambient temperature of the air conditioner and the current starting load of the air conditioner;
determining the initial opening degree of a bypass electronic expansion valve of the air conditioner according to the current environment temperature and the current starting load; wherein the current ambient temperature and the current boot load are both positively correlated with the initial opening degree;
and controlling the auxiliary electronic expansion valve to operate at the initial opening degree.
2. The enthalpy addition control method for air-supplying according to claim 1, wherein the step of determining an initial opening degree of an auxiliary electronic expansion valve of the air conditioner according to the current ambient temperature and the current start-up load comprises:
according to the current environment temperature, determining a target environment temperature coefficient corresponding to the current environment temperature from a pre-stored environment temperature coefficient table; the environment temperature coefficient table represents the corresponding relation between the environment temperature and the environment temperature coefficient, and the lower the environment temperature is, the smaller the environment temperature coefficient is;
according to the current starting load, determining a target load coefficient corresponding to the current starting load from a pre-stored load coefficient table; the load coefficient table represents the corresponding relation between the boot load and the load coefficient, and the smaller the boot load is, the smaller the load coefficient is;
and calculating the initial opening according to the target environment temperature coefficient and the target load coefficient.
3. The enthalpy-increasing vapor injection control method according to claim 2, wherein the loop temperature coefficient table includes a plurality of loop temperature intervals and a loop temperature coefficient corresponding to each loop temperature interval, and the lower the loop temperature interval is, the smaller the corresponding loop temperature coefficient is;
the step of determining a target environment temperature coefficient corresponding to the current environment temperature from a pre-stored environment temperature coefficient table according to the current environment temperature comprises the following steps:
determining a target environment temperature interval to which the current environment temperature belongs from the plurality of environment temperature intervals;
and taking the ring temperature coefficient corresponding to the target ring temperature interval as the target ring temperature coefficient.
4. The enthalpy adding air control method according to claim 2, wherein the load coefficient table includes a plurality of boot load intervals and a load coefficient corresponding to each boot load interval, and the smaller the boot load interval is, the smaller the corresponding load coefficient is;
the step of determining a target load coefficient corresponding to the current boot load from a pre-stored load coefficient table according to the current boot load comprises:
determining a target starting load interval to which the current starting load belongs from the plurality of starting load intervals;
and taking the load coefficient corresponding to the target startup load interval as the target load coefficient.
5. The enthalpy addition control method for air make-up according to claim 2, wherein the step of calculating the initial opening degree according to the target ring temperature coefficient and the target load coefficient includes:
calculating the initial opening according to a preset formula Psi = X Y a according to the target ring temperature coefficient and the target load coefficient;
wherein Psi represents the initial opening degree, X represents the target ring temperature coefficient, and Y represents the target load coefficient; a represents a setting parameter.
6. The enthalpy addition vapor injection supplementing control method according to claim 1, further comprising:
after the auxiliary electronic expansion valve operates for a set time length at the initial opening degree, acquiring the actual time length and the preset reference time length required by the air conditioner to reach a stable operation state;
judging whether the initial opening degree is reasonable or not according to the actual time length and the preset reference time length;
and if the initial opening degree is not reasonable, correcting the initial opening degree according to the current regulation trend of the auxiliary electronic expansion valve to obtain the corrected initial opening degree, and controlling the auxiliary electronic expansion valve to operate at the corrected initial opening degree when the air conditioner is started for the next time for air supplement and enthalpy increase.
7. The enthalpy addition control method for air inflation according to claim 6, wherein the step of judging whether the initial opening degree is reasonable according to the actual time length and a preset reference time length comprises:
judging whether the actual time length is greater than the product of the preset reference time length and a set correction coefficient;
if so, judging that the initial opening degree is not reasonable;
if not, judging that the initial opening degree is reasonable.
8. The vapor-supplementing enthalpy-increasing control method according to claim 6, wherein the step of correcting the initial opening degree according to the current regulation trend of the auxiliary electronic expansion valve to obtain a corrected initial opening degree comprises:
if the current regulation trend is continuously reduced, reducing the initial opening according to a preset formula Psi _ n = delta 1 Psi to obtain the corrected initial opening;
if the current adjusting trend is continuous opening, increasing the initial opening according to a preset formula Psi _ n = delta 2 Psi to obtain the corrected initial opening;
wherein Psi _ n represents the corrected initial opening; δ 1 represents a valve-closing coefficient, and 0 < δ 1 < 1; δ 2 represents a valve opening coefficient, and δ 2 > 1.
9. The vapor-filling enthalpy-increasing control method according to claim 6, further comprising:
and if the initial opening degree is reasonable, controlling the auxiliary electronic expansion valve to operate at the initial opening degree when the air conditioner opens air-supplying enthalpy increasing next time.
10. An enthalpy-increasing gas supply control device, comprising:
the system comprises an acquisition module, a judgment module and a control module, wherein the acquisition module is used for acquiring the current ambient temperature of the air conditioner and the current starting load of the air conditioner when the air conditioner starts to supplement air and increase enthalpy;
the determining module is used for determining the initial opening degree of a bypass electronic expansion valve of the air conditioner according to the current environment temperature and the current starting load; wherein the current ambient temperature and the current boot load are both positively correlated with the initial opening degree;
and the control module is used for controlling the auxiliary electronic expansion valve to operate at the initial opening degree.
11. An air conditioner, comprising a processor and a memory, wherein the memory is used for storing a program, and the processor is used for implementing the vapor-filling enthalpy-increasing control method according to any one of claims 1 to 9 when the program is executed.
12. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the method for enthalpy addition control for gas according to any one of claims 1 to 9.
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